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All 181 docs markdown files translated into 20 languages (apps/docs/<locale>/**). Companion to the i18n code PR; admin-merged because the file count exceeds GitHub's per-PR CI trigger limit. Validated by pnpm i18n:check (all surfaces, 0 stale/missing) and a clean all-locale docs build.
50 lines
1.5 KiB
Markdown
50 lines
1.5 KiB
Markdown
---
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description: "加速或減慢影片速度。"
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i18n_source_hash: 98dfc75c0507
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i18n_provenance: human
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i18n_output_hash: c4997a201c13
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---
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# Video Speed {#video-speed}
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加速或減慢影片速度，並可選擇保留音訊音高。
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## API Endpoint {#api-endpoint}
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`POST /api/v1/tools/video/video-speed`
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接受包含一個影片檔案和一個 JSON `settings` 欄位的 multipart form data。
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## Parameters {#parameters}
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| Parameter | Type | Required | Default | Description |
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|-----------|------|----------|---------|-------------|
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| factor | number | No | `2` | 速度倍率（0.25-4）。大於 1 的值加速，小於 1 的值減慢 |
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| keepPitch | boolean | No | `true` | 變更速度時保留音訊音高 |
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## Example Request {#example-request}
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```bash
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curl -X POST http://localhost:1349/api/v1/tools/video/video-speed \
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-H "Authorization: Bearer si_your-api-key" \
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-F "file=@clip.mp4" \
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-F 'settings={"factor": 0.5, "keepPitch": true}'
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```
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## Example Response {#example-response}
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```json
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{
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"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
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"downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/clip.mp4",
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"originalSize": 12500000,
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"processedSize": 24800000
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}
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```
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## Notes {#notes}
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- 倍率 `2` 會使播放速度加倍（時長減半）。倍率 `0.5` 會使播放速度減半（時長加倍）。
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- 當 `keepPitch` 為 `true` 時，音訊會進行時間伸縮，讓聲音聽起來自然。當為 `false` 時，音高會隨速度按比例變化。
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- 有效範圍為 0.25x 到 4x。
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